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<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>对象方法扩展</title>
  </head>
  <body>
    <script>
      //1. Object.is 判断两个值是否完全相等
      //   console.log(Object.is(120, 120)); // ===
      //   console.log(Object.is(NaN, NaN)); // ===
      //   console.log(NaN === NaN); // ===

      //2. Object.assign 对象的合并
      //   const config1 = {
      //     host: "localhost",
      //     port: 3306,
      //     name: "root",
      //     pass: "root",
      //     test: "test",
      //   };
      //   const config2 = {
      //     host: "http://atguigu.com",
      //     port: 33060,
      //     name: "atguigu.com",
      //     pass: "iloveyou",
      //     test2: "test2",
      //   };
      //   console.log(Object.assign(config1, config2));

      //3. Object.setPrototypeOf 设置原型对象  Object.getPrototypeof
      const school = {
        name: "尚硅谷",
      };
      const cities = {
        xiaoqu: ["北京", "上海", "深圳"],
      };
      Object.setPrototypeOf(school, cities);
      console.log(Object.getPrototypeOf(school));
      console.log(school);
    </script>
  </body>
</html>
